Method of galvanizing



March 20, 1928; 1,663,037

J. BLACKBURN ET AL METHOD OF GALVANIZING Filed Dec. v, 1925 PatentedMar. 20, 1928.

UNITED STATES v I 1,3,031 PAr r OFFICE.

JASPER nnscxnnnn, or WEBSTER oaovns, AND ARTHUR- ALBRECHT, or en LOUIS,nrssoonr; sarn ARTHUR ALBRECHT nssrenon To SAID JAsrna BLACKBURN.

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Our invention relates to improvements in 'method of andapparatus forgalvanizing,

and has for its r'i'mary object the method of galvanizing, w ich iscommercially known 6 as the hot dip process in which a number ofarticles are simultaneously treated in the molten metal and thenplunging them into a cooling bath and during such plunging treating thesame so that all blisters and lo roughness due to cooling areeliminated.

A still further object is the construction of an apparatus forgalvanizing by means of which the finished articles are first placed ina pickling solution for the purpose of to removing all scale, oil, rustand other impurities, then dip ing the same in a galvanizing solution,and'l'a'stly cooling the same in such a manner that the formation ofblisters and mu 11 spots is eliminated and a smooth as job resu ts.

In the drawings: Fig. 1 is a view of the galvanizing tank employed incarrying out our ihvention;

Fig. 2 is an enlarged section of the cooling as vat taken on the line 22of Fig. 4; and

Fig. 3 is a perspective view'illustrating the manner assembling a numberof articles to be galvanized; f

ig. 4 is an end view of dipping tank loyed; and ig. 5 is an elevation ofthe linlg tanks;,and

. ig. 6 is a top plan view of galvanizing tank. v

In the construction of our device, we emloy a number of pickling vats 4.This may either in the form of crooks or they may be of any desiredshape. 5". represents a heating furnace ofan desired type in which so islocated a tank 6. his tank is designed to contain spelter or othermaterial used in galvanizing. The furnace 5 is preferably provided witha'shelf 7, the purpose of which will be explained later.. Mounted on thefurnace 5 is a fuel pipe 8 through which gas or similar fuel is, passed.This ipe is provided with branch pipes .9, whic terminate in burners orjet tips 10. These tips are above the ta 6 and face each other-so thatthe flames issuing from these tips will be projected toward each otherand across the top of the tank 6. Connected to eachof the tips 10 is anair 5: 11, which lplipes are connected to a e pipe 12. ispipe has avalve 13 which is an ac em several pick- 1 ed to lie-opened by .means ofa foot lever 14 A spring 15 is furnace 5 is acooling tank 17, which haslocated therein a plate 18.- This plate is preferably arranged at anangle as illustrated in Fig. 2. Located in the tank is a body ofwater 19on which floats a body or layer of oil 20. 21 represents a plurality ofarticles to be galvanized and 22 the loop or wire by means of which thearticles are secured together.

'Themethod of utilizing the apparatus is as follows A number of articlesare strun on a wire loop 22. J These articles, whic will be termedbundles hereafter, are then placed in the pickling vats which contain asolution for cleansing the articles. Thespelter or other galvanizingmaterial is placed in the tank 6 and heat supplied thereto from thefurnace 5 so as to melt the same. The oil and water are also preferablheated but not sufliciently to cause either 0 them to boil.

After the pickling has been completed and the galvanizing materialmelted in the tank,

the fuel supply is turned on and ignited as it issues from the tips 10.

[he device is now ready for. operation. An operator takes a hook andremoves one of the bundles from the pickling vat and places it on theshelf 7. An operator standing on the opposite side of the'furnace 5 nowpicks up the bundle with another hook and dips it into the molten metal,leaving it immersed for a'short period of time. Ihe bundle is thenraised out of'the metal and the operator depresses the pedal or lever14, openingthe valve 13 and causing a jet of air to mingle with the fuelpassing through the tips 10. This causes an intensely hot flame toissue" from each of these tips and play. around the bundle, heating thesame and at the 'same'time causing the metal to become more fluid.Certain parts of this metal drip 03 and back into the vat.

The operator then removes his foot from the pedal 14 shutting ofi theair supply, ahd swinging round strikes the bundle against the plate 18,thus imparting a jar to the.

bundle and separating any articles which may have become stuck together.The" bundle, is't en lowered and passes through the layer of oil and bya continued movement downinto the water after which it is withdrawn andplaced in a suitable location where the remainder of the cooling cantakeplace. We have found b this method .that a much smoother job resu tsbecause by cooling with oil in this manner the tendency of the materialto blister and present a roughened surface is'eliminated.

While we'have shown and described our device as utilizing oil on top ofwater, this can be varied by usin oil entirely but the oil and watermakes t e cost of our operation considerably less because it is notneces sary to use such a large quantity of 011, and the results obtainedin either case are the same. .A

Having fully described our invention,

what we claim is 1. The method of galvanizing which comprises firstpickling the article to be treated for a predetermined length of time,second dipping the same in a bath of'molten metal, third suspending thearticle in a flame for raising its temperature and removing surbundlefrom said bath and simultaneously therewith subjecting the same to aflame for increasing its temperature, fifth jarring said articles so asto separate the same from each other, sixth passing said bundles throughoil and into water by a continuous movement for coolin and setting themetal adhering to the artic es. 7

3. The method of galvanizing of claim 1 in which the oil and water areheated In testimony whereof we have aflixed our signatures.

JASPER BLACKBURN.

' ARTHUR ALBRECHT.

so i

